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We found 11 dictionaries with English definitions that include the word positrons:
Click on the first link on a line below to go directly to a page where "positrons" is defined.

General (9 matching dictionaries)

1. positrons: Merriam-Webster.com [home, info]
2. positrons: Collins English Dictionary [home, info]
3. positrons: Vocabulary.com [home, info]
4. positrons: Wordnik [home, info]
5. positrons: Cambridge Advanced Learner's Dictionary [home, info]
6. positrons: Wiktionary [home, info]
7. positrons: Dictionary.com [home, info]
8. Positrons: Wikipedia, the Free Encyclopedia [home, info]
9. Positrons: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

10. Positrons: Encyclopedia [home, info]

Medicine (1 matching dictionary)

11. Positrons: Medical dictionary [home, info]

(Note: See positron for more definitions.)

Quick definitions from WordNet (positron) ▸ noun:  an elementary particle with positive charge; interaction of a positron and an electron results in annihilation ▸ Also see positron ▸ Words similar to positrons ▸ Usage examples for positrons ▸ Popular adjectives describing positrons ▸ Words that often appear near positrons ▸ Rhymes of positrons ▸ Invented words related to positrons